超长线列双波段红外焦平面探测器杜瓦封装技术研究

针对拼接型短/中波的超长线列焦平面探测器与直线脉管集成耦合的要求，分析了超长线列焦平面杜瓦封装的难点。通过对超长冷平台的温度均匀性、超长冷平台支撑结构、大体积组件杜瓦低热负载、超长线列杜瓦真空寿命等封装技术进行研究，提出了多点S型冷链结合导热层的三维热输出方法，设计了桥式两基板的超长冷平台支撑结构，解决了超长冷平台高温度均匀性、集成探测器后低应力及焦深控制、超长线列探测器杜瓦组件的环境适应性、低热负载和长真空寿命等关键技术，成功研制超长线列双波段焦平面探测器制冷组件，并通过一系列空间环境适应性试验验证，试验前后组件性能未发生明显变化，满足工程化应用的要求。

Study on Dewar package for dual-band long linear IRFPA detectors

According to the requirement of the butting short and middle waves long linear IRFPA detectors integrating and coupling with the inline pulse tube cryocooler, the difficulties of the Dewar package were discussed. By studying the temperature uniformity and the supporting structure of long butting substrate, the cold loss and the vacuum life of the large-size Dewar, the three-dimensional thermal output method of the multi-point S type thermlink combined with the conductive layer was proposed, and the supporting structure of bridge with the dual substrate was designed, which were to solve the key technologies of higher temperature uniformity of the long butting substrate, the lower thermal stress of the integrated detector and depth of focus control, space environmental adaptability, lower cold loss and longer vacuum life, the Dewar assembly for the dual-band long linear FPA had been successfully developed, and tested by serial space environment adaptability tests, the results show that those main performances do not change obviously. The Dewar assembly satisfys the requirements of the space application.